Fluid strainer construction



Sept. 9, 1947; A. ZECH 2, 427,320

FLUID STRAINER CONSTRUCTION Filed Jan. 6, 1944 s Shets-Sheet 1 INVENTOR. A LFR ED ZECH ATTORNEYS Sept. 9, 1947. A. ZECH .FLUID STRAINER CONSTRUCTION Filed Jan. 6, 1944 3 Sheets-Sheet 2 IN V EN TOR.

ALFRED ZECH ATTO RN EYS Sept. 9, 1947. A. ZECH 2,427,320

FLUID STRAINER CONSTRUCTION Filed Jan. 6, 1944 3 Sheets-Sheet 3 FIG.4.-

IN V EN TOR.

ALFRED ZECH ATTORNEYS Patented Sept. 9, 1947 FLUID STRAINER CONSTRUCTION 7 Alfred Zech, Detroit, Mich., assignor to Industrial Wire Cloth Products Corporation,

Wayne,

Mich., a corporation of Michigan Application January 6, 1944, Serial No. 517,179

2 Claims.

This invention relates to fluid strainers.

An object of this invention is to provide a strainer assembly wherein the casing may be built up from sheet metal, the parts forming the casing being brazed or welded together so as to provide for a minimum of machining and a considerable reduction in weight.

Another object of this invention is to provide a strainer assembly which is so constructed and arranged that it can be secured to a suitable support and the casing adjusted relative to the support to thereby position the pipe connections in their proper places, the adjustability of the casing eliminating the necessity of providing numerous models with particularly positioned connections.

A further object of this invention is to provide in a strainer assembly an improved means for securing the screen in the casing so that the screen may be readily removed for cleaning or other purposes.

A further object of this invention is to provide an improved strainer assembly embodying a novel sediment sump or trap, the trap carrying a flange for receiving a sealing ring and the latter seating on a seat struck inwardly from the lower end of the casing.

A further object of this invention is to provide a strainer assembly in which the casing is formed out of stamped sheet metal, thereby producing a strong and light weight casing which can.be

quickly and accurately assembled on a production line, Other objects and advantages will appear to those skilled in the art upon reference to the following description and the accompanying drawings in which Fig. 1 is a view in elevation of the device.

Fig. 2 is a top plan view.

Fig. 3 is a bottom plan of the device.

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 1.

Fig. 5 is a section on line 55 of Fig. 1.

Fig. 6 is a section on line ii-6 of Fig. 1.

Referring to the drawings, and first to Figs. 1 to 6 inclusive, the numeral l5 designates generally a housing which is built up from sheet metal. The housing [5 includes a cylindrical body l6 which is formed at its upper end with a dome-shaped top wall I! provided with an annular flange l8 terminating in a depending vertical flange 19. A coupling nut or socket 20 is disposed within the vertical flange I9, being provided with interior threads 2| for connection to a pipe, the connection 20 being an outlet connection. The coupling 20 is adapted to be firmly held in the upper end of the housing I5 by crimping a portion of the body of the coupling 20, as indicated at 22. This coupling member 20 may also be brazed, welded or otherwise firmly secured within the flange Hi.

The body [6 of the housing is formed at a point slightly below the dome-shaped top portion I! with an inwardly projecting annular flange 23 in which an intake coupling member 24 is adapted to be fixed. The coupling member 24 is formed with an annular inner portion 25 which has the inner end thereof crimped over as at 26 so as to tightly hold the coupling member 24 within the flange 23. If desired, the coupling member 24 may be welded, brazed or otherwise securely sealed within the flange 23. The domeshaped portion I! is formed at one side of the outlet coupling member 20 with an upwardly offset boss 21 to which a nipple or coupling member 28 is secured. The coupling member 28 is formed with interior threads 29, and a removable plug 30 is mounted in the coupling member 28.

The body I6 is formed of sheet metal and has secured within the lower portion thereof with a cylindrical extension 3|. The extension 3| telescopes upwardly into the body I B and may be brazed, welded or otherwise securely sealed in the lower portion of the body [6. The extension 3| is preferably of a thickness slightly greater than the thickness of the body 15 and is formed at its lower end with an inwardly projecting flange 32 which has formed integral therewith an upwardly and inwardly offset annular seat 33. A relatively short cylindrical sleeve 34 is welded, brazed or otherwise firmly secured about the lower portion of the sleeve or extension 3! and is formed at its lower end with an inwardly projecting flange 35. The flange 35 is preferably formed with a series of circumferentially spaced apart cutouts 36, as shown in Fig. 3, so as to thereby form inwardly projecting tongues for detachably holding a pressure cap 3! on the lower portion of the housing.

The cap 31 is cup-shaped and is formed with a plurality of circumferentially spaced apart flanges 38 for engagement with the flanges or tongues 35. The flanges 38 are of such a length as to be freely inserted between the adjacent ends of the flanges or tongues 35.

A strainer generally designated as 40 is removably disposed within the interior of the housing I and comprises a cylindrical reinforcing screen member 4! which engages about an inner cylindrical screen member 42. The two screen members n and 42 are connected together at their upper ends by a coupling ring 43 which is U-shaped in transverse section with the bight thereof uppermost. The housing within the dome-shaped portion I! thereof has a screen retainer comprising a dome-shaped upper portion 46 which is formed with a top portion 41 engaging on the inner side of the flat portion l8, and the top portion 4! is formed with a depending flange 48 engaging on the inner side of the depending flange l9. The retainer is also formed with a substantially cylindrical body Mlextend ing downwardly from the dome-shaped portion and an outwardly extending annular flange 50 is formed integral with the lower end of the cylindrical body 49. A depending annular flangeii extends downwardly from the annular flange'5ll and is formed with a flared lower portion .52 to facilitate the insertion of the strainer member iil within'theretainer. The bight is adaptedto be be disposed in confronting position to the-annular'flan-ge 58-0? the retainer. A substantially cone-shaped screen -53 is disposed within the screen-42, having the base thereof secured to the lower-end of the screen 42 at a point above the lower end of the screen 4!. The outerreinforcing screen 4| projects below the lower ends of thefltwo-screen member d2 and53 and is secured Within an annular member-54 which is formed with an inwardly projecting flange ,55 and'a depending flangefifi.

A sump or-trap' member 5'! is :disposed inthe lowerendof the'housing l5, .closing the'latter and comprises a -cup-shaped "body '58 which is formed with an annular upwardly extending flange $29. An annularmember 450 is secured in an-y-suitablemanner about 'theouter side of the flange 58 and the'annular member 60 is formed with an annular outwardly extending flange 6|. A sealing gasket -62is adapted to be interposed between't-heflange 'GI and the seat 33 so as to thereby seal the lower end of the housing i5. The flange of the reinforcing ring .56 is disposed within the 'fiangeE'S andthe horizontal flange 55 rests upon the upper end of the'i'lange'EEi.

Thetrap orsump -51 is formed in the center thereof with a depending flange -63 within which the-upper end 'W of a nipple, 85 isadapted to be firmly secured. The nipple 65 depends below the trap or sump'fi? and is formed at its vlower end 'witl'iinteriorthreads'66 within which a removable plugjfil'is adaptedtobe mounted. The sump ortrapld'l is held tightly against the sealing member 62 by means of a threaded 'CUbB-BBWhiCh rotatably -.engages about the nipple -65. The :t-hreaded anember $8 is threaded through .a nut G9 which is iormed'with an annular extension fi-ilrcrimped; as. at llgto the lowerjportion of the cap-r31.

Thethreaded niem'berfifipat its lower end" is 'ffllmfitdiwllj'h :3. polygonal nut portionor 'head lz' :to which :ahandle 13. is secured. The: handle 13 in transverse section is of U-shape and is formed :with a olygonal central portion (see Fig. 3)

split locking ring 98 is adapted to engage. The ring 98 is disposed below the handle 13 and rotatably holds the handle 13 on the drain nipple 65.

As shown in Figs. 1 and 4, the band 82 is circumferentially slidably mounted on the body by means of upper and lower flanged track members 87 which are fixed to the outer wall of the body and provided with elevated flange portions 31A under which lie the edges of the band 82.

Also carried in the track members 81 is a base pad- 88 which consists ofastrip or band of somewhat less length thanthe distance between the ends of band 82 and has formed from the central portion thereof of the flat base 89 shown as produced by punching out a portion with an outwardly extending flange 89A and turning in the latter to;produce.a rounded edge 89B.

'-l\/lounted slidably in the track members 81, the p-ad83 and band 82 may be moved circumferentially so as to mount the filter with the inlet at any desired radial location.

With a strainer construction as hereinbefore described, it is not necessary to provide right and left connection to the housing aswhere the attaching ears for'the housing are formed 'integral with or fixed thereto.

A-strainerassembly as hereinbefore described maybe constructed in great part out of stamped sheet metal which may be secured together in the manner hereinbefore described, thus providing a relatively light strainer assembly which will not leak and which-is so constructed that the-screen structure on the interior thereof may bereadily removed-for-cleaning or repair and the sump or trap may also be remove'd'for cleaning otherpurposes.

This assembly hasbeen particularly designed 'for 'use in airplanes where reduction of weight is a necessary factor and also where reduction in-the quantity of metal used is an important factor at this time.

The assembly hereinbefore described is designed for the filtering of any suitable fiuid, several examples being gasoline, and'lubricating or otheroils. The terms strainer means and screen means as used in'tlhe claims are interpretedas being any suitable filter element formed of either fine mesh screen or other suitable filtering material.

I claim:

1. A strainer structure comprising a housing 'formedof acylindrical body atop wall and a trap removably secured to the :bottom of said body, said housing having inlet and outlet; ports, strainer rmeans in said housing, opposed channeled retainer members carried :by the outerside -of1said'body, and a supporting means engageable in said retainer members.

2. A strainer structure comprising a housing formed of a cylindrical body, inlet and outlet connections carriedby said body, .a cylindrical extension fixed to and depending from said body, an inwardly projecting annular seat .integral with said extension, a sleeve fixed to and .depending'gfroin said extension and extending to .belowsaid seat, a plurality. of .circumferentially spaced apart inwardly projecting tongues carried by .the lower end of saidisleeve, a cup-shaped trap engageable against the under side of said seat, a clamping cap for said .trap, outwardly "directed circum'ferentially spaced. apart tongues carried bysaid "cap and adapted to engage the upperJsideof said 'first'tongues, a drain nipple carried by 'saidtnap, :a nut "carried by said cap *about said "nipple, a threaded tubular pressure member rotatable about said nipple and threaded through said nut, means rotatably locking said pressure member on said nipple, and a handle carried by said pressure member whereby to force said trap against said seat when said tongues are in engagement.

ALFRED ZECH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,277,737 Wilkinson Mar. 31, 1942 2,068,282 7 Strindberg Jan. 19, 1937 Number Number 

